Machine for cutting metal.



N0. 684,667. Patented Oct. I5, i901.

G. B. BEALE, D. SASSEMAN &. F. H. SMITH. MACHINE FOR CUTTING METAL.

Appl'cation filed Nov. 17, 1900.)

(No Model.) 3 sheets-sheet u.

...Tl Illhli MII!" 1...

No. 684,667. Paten-md on. l5, 190|.

G. B. BEALE, D. SASSE'MAN & F. H. SMITH.

MACHINE FOR CUTTING METAL.

(Application led Nev. 17, 1900.) (No Model.) 3 Sheets-Sheet 2.

. No. 684,667. Patented Oct. l5, I90I.

G. B. `BEALE', D. SASSEMAN & F. H. SMITH. MACHINE FOR CUTTING METAL. A plication led Nov. 17, 1900.)

3 Sheets-Sheet 3.

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GEORGE I3. BEALE AND DAVID SASSEMAN, OF CHICAGO, AND FRED Il. SMITH, OF OAKPARK, ILLINOIS.

MACHINE FOR CUTTING METAL.y

SPECIFICATION forming part of Letters Patent N o. 684,667, dated October 15, 1901 Application filed November 1'7, 1900. Serial No. 36,849. (No model.)

. ing is a specification.

In the art of milling, turning, boring, and similarly working metal it is customary to lubricate the cutter. rIhis is done in various ways, depending upon the construction of the machine. Usually it is done by causing a stream of oil or other lubricant to fall on the cutter and work, so as to keep the cutter at all times flooded. It has also been proposed to make the cutter hollow and provide it with radial passages leading to grooves between the teeth, so that oil discharged into the interior of the cutter will iind its way to the grooves and thence to the teeth. In no instance, however, has the oil been delivered to the cutting edge of the cutter in t-he manner and at the velocity hereinafter described.

GEORGE B. BEALE, one of the present applicants, has discovered that the speed of any given machine may be greatly increased by increasing the velocity of the lubricant discharged on the teeth of the cutter; and the object of the present invention is to provide a machine by which this can be accom plished. To this end the present invention consists in the features of novelty that are hereinafter described, and in order that it may be fully understood we will describe it with reference to the accompanying drawings, which are made part hereof, and in which- Figure l is a side elevation of a milling-machine embodying the invention. Fig. 2 is au enlarged horizontal section of a portion thereof on the line 2 2, Fig. 1, looking downward. Fig. 3 is an enlarged vertical section of the upper portion thereof, the section being taken in the axial plane of the mandrel. Fig. 4 is an enlarged vertical section of the lower portion thereof, the section being taken in the axial plane of the mandrel. Fig. 5 is a horizontal section of a portion thereof on the line 5 5, Fig. 4, looking downward. Fig. 6 is a vertical section of the lower portion of the cutter and its accessories, the section being taken in the axial plane of the cutter. Fig. 7 is a side elevation of the lower portion of the cutter. Fig. S is an end view thereof. Fig. 9 is an elevation of one of the parts under slight modification.

A represents various parts of the frame of the machine,B is a hollow mandrel mounted to revolve therein, and C a pulley carried thereby, through which motion is transmitted to it. The mandrel has a tapering socket in which fits the tapering stem D of the cutterD. As here shown, the cutter is of the type known as an end-mill cutter, being provided on its end with teeth having radial cutting edges and being provided on its periphery with cutting-teeth, each tooth being separated from the next by a well-dehned groove or channel. Ordinarily the rear side of each end tooth slopes from its front or cutting edge to the base of the front of the succeeding tooth; but for the purposes of our invention we prefer to shorten the rear face of each tooth and pro-V vide a well-defined groove or channel immediately in front of the adjacent tooth. The cutter and its stem are hollow, and in it is disposed a tube E, which is closed at its lower end by an end piece e and is provided at one side and immediately adjacent to its lower end with an opening e for the discharge ofthe lubricant. This opening is disposed directly opposite the channels in the end of the cutter, and the inner face of the end piece e is sloped downward toward the opening, terminating in a sharp edge, in order to discharge the lubricant directly into the channels between the teeth, which are for the time being active, thechannels between the inactive teeth being blanked or closed by the end piece c. We prefer to use a tube E, constructed as described; but in its broadest aspect the in# vention is not limited thereto, but comprehends any device that will blank the channels between the inactive teeth of the cutter and direct the entire volu me of lubricant, or practically all of it, into the channels between the active teeth. IVe have therefore shown in Fig. 9 a rod or wire E, which is adapted to be substituted for the tube E, the lower end of the rod being provided with a foot or enlargement E, one side of which is ICO adapted to blank the channels between thek inactive teeth, its upper side being sloped downward to a thin edge, so as to direct the lubricant directly into the channels between the active teeth. Without some means for blanking the channels between the inactive teeth the greater proportion of the lubricant would be discharged through them, as they would present the course of least resistance, and this would be objectionable.

While we have specifically claimed in this application the particular means shown in Figs. l to 6, inclusive, for blanking the channels between the inactive teeth of the cutter, we desire to have it understood that in its broadest aspect the invention is not limited thereto, but, on the contrary, includes any means for accomplishing this result, other means being shown in our application of even date herewith, Serial No. 36,850, while still others will readily suggest themselves to those skilled in the art.

The machine shown in the drawings has a reciprocating bed-plate F,y which may be actuated in customary or any desired manner. It is desirable to have the cutter work during every reciprocation of the bedplate, and with a cutter of the class shown in the drawings it becomes necessary to give the device for blan king the channels between the inactive teeth a half-turn at the completion of each stroke of the bed-plate in order that the oil may be discharged, as above described, only into the channels between the active teeth. lo this end we secure to the tube a pinion G, with which meshes a toothed segment I-I, secured to the upper end of a rock-shaft I, the lower end-of which carries an arm J, provided with studs K K', located in the path of stops L L', carried bythe bed-plate, one upon each side of the cutter. These studs K K' andthe stops L L' are so disposed that when the bedplate has just about completed its stroke in one direction one of the stops L L' will come in contact with one of the studs K K' and move the arm J, the movement being transmitted through the rock-shaft I, segment II, and thence to the pinion G, by which the pinion is given a halfturn. In Fig. 5 the parts are shown in the positions which they occupy when the cutter is about to complete its cut in the direction of the arrow on the work X. When the cutis complete, the stop L, will come in contact with the stud K and cause the above-described reversal in the position of the tube at about the time the movement of the bed-plate is reversed and before the stop L reaches the cutter.

In order to form a liquid-tightjoint between the mandrel and the tube, the mandrel is provided at its upper end with a stuffing-box consisting of a ring M, an elastic packing N, and a nut O, threaded hto the mandrel, between which nut and the washer M the elastic packing is clamped so as to form a tight joint around the tube. In order to form a liquidtight joint between-the tubeandthe fitting P,

with which is connected, the pipe P', leading from the pump'orother source from which the lubricant is supplied, the fitting Pis provided with a stuffing-box consisting of a ring or washer M', an elastic packing N', and a nut O', which is serew'ed into the fitting, between which nut and the washer M' the elastic packing is clamped so as to form a tight joint around the tube. The fitting P being stationary, the friction of the packing N' upon the tube will counteract the friction of the packing N upon the tube, and thereby tend to hold the tube against rotation due to the frictonal contact of the packing N with it;

`but in order to further insure the non-rota tion of the tube it is su rrounded and clamped by a split ring Q, carried by a rigid arm R, fixed tothe frame of the machine. This clamp and arm also serve to support the tube through the medium of the pinion G, which is non-rotatively secured to the tube and bears upon the clamp Q.

Having described our invention, what we claim as new therein, and desire to secure by Letters Patent, is-

1. In a machine of the cliss described, the combination with a cutter. having teeth and intervening channels, of means for discharging a lubricant into the channels between the teeth, and means for limiting the discharge to a limited number of the channels, substantially as set forth. i

2. In a machine of the class described, the combination with a cutter having teeth and intervening channels, of means for discharging a lubricant into the channels between the active teeth, and means for preventing the discharge of the lubricant into the channels between the inactive teeth, substantially as set forth.

3. In a machine of the class described, the combination with a cutter having teeth and intervening channels, said cutter having also an internal passage, of means for causing a lubricant to How through said passage and into the channels, and means for confining the flow of lubricant to a limited number of' said channels, substantially as set forth.

et. In a machine of the class described, the combination with a cutter having on its periphery cutting-teeth and intervening channels and having in its end channels registering with the channels aforesaid, said cutter having also an internal passage, of means for causing a lubricant to fiow through said pas sage, thence into the channels in the end ofV the cutter and thence into the channels between the teeth, substantially as set forth.

5,. In a machine of the class described, thel combination with a cutter having on its periphery teeth and intervening channels and having in its end channels registering with the channels aforesaid, said cutter having also an internal passage, of means for causing a lubricant to flow through said passage, thence through the channels in the end of the' cutter and thence through the channels be# IOO I gotween the teeth, and means for confining the iioW to the channels between the active teeth, substantially as set forth.

6. In a machine of the class described, the combination with a cutter having teeth and intervening channels, of a hollow stationary part having means for blanking a limited number of said channels,and means for causing a lubricant to flow through said stationary part and into the remaining channels,

y substantially as set forth.

7. In a machine of the class described, the combination With a cutter having on its periphery cutting-teeth and intervening channels and having on its end channels registering with the channels aforesaid, said cutter having also an internal passage, of means for causing a lubricant to flow through said passage and thence into the channels, and a stationary device Within the cutter for conning the discharge to the channels between the active teeth, substantially as set forth.

8. In a machine of the class described, the combination with a cutter having teeth and intervening channels, said cutter having also an internal passage, of means for causing a lubricant to fioW through said passage and escape therefrom into the channels, and a stationary device Within the passage aforesaid for confining the discharge to a limited number of channels, substantially as set forth.

v9. In a machine of the class described, the combination with a cutter having teeth and intervening channels and having an internal passage, of a stationary tube located in said passage, and means for causing a lubricant to flow through said tube and escape therefrom into the channels aforesaid, substantially as set forth.

10. In a machine of the class described, the combination with a cutter having teeth and intervening channels and having an internal passage, of a stationary tube located in said passage and having at its extremity an opening registering with a limited number of said channels, substantially as set forth.

1l. In a machine of the class described, the combination with a cutter having teeth and intervening channels and having also an internal passage, of means for causing a lubricant to fioW through said passage and thence into the channels, a stationary device located in the passage aforesaid and adapted to coniine the lubricant to a limited number of said channels,and means forintermittently changing the position of said device, substantially as set forth.

12. In a machine of the class described, the combination with a cutter having teeth and intervening channels and having also an internal passage, of means for causing a lubricant to flow through said passage and thence in to the channels, a stationary device located in the passage aforesaid and adapted to coniine the lubricant to a limited number of said channels, and means for intermittently irnparting a half-turn to said device, substantially7 as set forth.

13. In a machine of the class described, the combination with a cutter having teeth and intervening channels and having also an internal passage, of a stationary tube located in said passage, said tube having at its end an opening registering with a limited number of said channels, and means for intermittently imparting a part revolution to said tube for changing the position of the opening, substantially as set forth.

la. In a machine of the class described, the combination with a cutter having teeth and intervening channels, said cutter having also an internal passage, of means for causing a lubricant to flow through said passage and into the channels, a device located in the passage aforesaid for confining the lubricant to a limited number of said channels, a pinion carried by said device, a toothed sector engaging the pinion, a rock-shaft to which said sector is secured, an arm carried by said shaft,

studs carried bythe arm, and means carried bythe reciprocating bed for engaging one or the other of said studs at about the completion of each stroke of the bed, whereby the shaft is alternately rocked in opposite directions and the position of the device aforesaid changed, substantially as set forth.

15. In a machine of the class described, the combination with a hollow cutter having on its end cutting-teeth and intervening channels and having also peripheral channels, of means for causing a lubricant to iioW through said cutter, thence outward through the end channels and thence through the peripheral channels, substantially as set forth.

GERGE REALE. DAVID SASSEMAN. FRED H. SMITH.

Witnesses:

L. M. HOPKINS, B. C. Suus.

IOO 

